<template>
  <div class="app-container">
    <el-form label-width="120px">
      <el-form-item label="信息描述">
        <el-tag type="info">excel模版说明</el-tag>
        <el-tag>
          <i class="el-icon-download"/>
          <a href="/static/课程分类.xls">点击下载模版</a>
        </el-tag>
      </el-form-item>
      <el-form-item label="选择Excel">
        <el-upload
          ref="upload"
          :auto-upload="false"
          :on-success="fileUploadSuccess"
          :on-error="fileUploadError"
          :disabled="importBtnDisabled"
          :limit="1"
          :action="BASE_API+'eduservice/subject/addSubject'"
          name="file"
          accept="application/vnd.ms-excel">
          <el-button slot="trigger" size="small" type="primary">选取文件</el-button>
          <el-button
            :loading="loading"
            style="margin-left: 10px;"
            size="small"
            type="success"
            @click="submitUpload">{{ fileUploadBtnText }}</el-button>
        </el-upload>

      </el-form-item>

    </el-form>

  </div>

</template>

<script>

  export default {
      data() {
        return {
          BASE_API: process.env.BASE_API, // 接口API地址
          OSS_PATH: process.env.OSS_PATH, // 阿里云OSS地址
          fileUploadBtnText: '上传到服务器', // 按钮文字
          importBtnDisabled: false, // 按钮是否禁用,
          loading: false
        }
      },
      created(){

      },
      methods: {
        submitUpload() {
          this.fileUploadBtnText = '正在上传'
          this.importBtnDisabled = true
          this.loading = true
          this.$refs.upload.submit()
        },
        fileUploadSuccess(response) {
          if(response.success === true){
            this.fileUploadBtnText = '导入成功'
            this.loading = false
            this.$message({
              type:'success',
              message: response.message
            })
          }
        },
        fileUploadError() {
            this.fileUploadBtnText = '导入失败'
            this.loading = false
            this.$message({
              type:'error',
              message: '导入失败'
            })
        }
      }
    }
</script>

<style scoped>

</style>
